Input: add support for TI Touchscreen controller
This patch adds support for TI's touchscreen controller for a 4/5/8 wire resistive panel that is directly fed to the ADC. This touchscreen controller will be part of AM335x TI SoC. The TRM can be found at: http://www.ti.com/lit/ug/spruh73a/spruh73a.pdf Signed-off-by: Patil, Rachna <rachna@ti.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
parent
f79e30a809
commit
1b8be32e69
|
@ -460,6 +460,18 @@ config TOUCHSCREEN_TOUCHWIN
|
|||
To compile this driver as a module, choose M here: the
|
||||
module will be called touchwin.
|
||||
|
||||
config TOUCHSCREEN_TI_TSCADC
|
||||
tristate "TI Touchscreen Interface"
|
||||
depends on ARCH_OMAP2PLUS
|
||||
help
|
||||
Say Y here if you have 4/5/8 wire touchscreen controller
|
||||
to be connected to the ADC controller on your TI AM335x SoC.
|
||||
|
||||
If unsure, say N.
|
||||
|
||||
To compile this driver as a module, choose M here: the
|
||||
module will be called ti_tscadc.
|
||||
|
||||
config TOUCHSCREEN_ATMEL_TSADCC
|
||||
tristate "Atmel Touchscreen Interface"
|
||||
depends on ARCH_AT91SAM9RL || ARCH_AT91SAM9G45
|
||||
|
|
|
@ -48,6 +48,7 @@ obj-$(CONFIG_TOUCHSCREEN_PIXCIR) += pixcir_i2c_ts.o
|
|||
obj-$(CONFIG_TOUCHSCREEN_S3C2410) += s3c2410_ts.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_ST1232) += st1232.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_STMPE) += stmpe-ts.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_TI_TSCADC) += ti_tscadc.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_TNETV107X) += tnetv107x-ts.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_TOUCHIT213) += touchit213.o
|
||||
obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT) += touchright.o
|
||||
|
|
486
drivers/input/touchscreen/ti_tscadc.c
Normal file
486
drivers/input/touchscreen/ti_tscadc.c
Normal file
|
@ -0,0 +1,486 @@
|
|||
/*
|
||||
* TI Touch Screen driver
|
||||
*
|
||||
* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License as
|
||||
* published by the Free Software Foundation version 2.
|
||||
*
|
||||
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
|
||||
* kind, whether express or implied; without even the implied warranty
|
||||
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*/
|
||||
|
||||
|
||||
#include <linux/init.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/input.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/input/ti_tscadc.h>
|
||||
#include <linux/delay.h>
|
||||
|
||||
#define REG_IRQEOI 0x020
|
||||
#define REG_RAWIRQSTATUS 0x024
|
||||
#define REG_IRQSTATUS 0x028
|
||||
#define REG_IRQENABLE 0x02C
|
||||
#define REG_IRQWAKEUP 0x034
|
||||
#define REG_CTRL 0x040
|
||||
#define REG_ADCFSM 0x044
|
||||
#define REG_CLKDIV 0x04C
|
||||
#define REG_SE 0x054
|
||||
#define REG_IDLECONFIG 0x058
|
||||
#define REG_CHARGECONFIG 0x05C
|
||||
#define REG_CHARGEDELAY 0x060
|
||||
#define REG_STEPCONFIG(n) (0x64 + ((n - 1) * 8))
|
||||
#define REG_STEPDELAY(n) (0x68 + ((n - 1) * 8))
|
||||
#define REG_STEPCONFIG13 0x0C4
|
||||
#define REG_STEPDELAY13 0x0C8
|
||||
#define REG_STEPCONFIG14 0x0CC
|
||||
#define REG_STEPDELAY14 0x0D0
|
||||
#define REG_FIFO0CNT 0xE4
|
||||
#define REG_FIFO1THR 0xF4
|
||||
#define REG_FIFO0 0x100
|
||||
#define REG_FIFO1 0x200
|
||||
|
||||
/* Register Bitfields */
|
||||
#define IRQWKUP_ENB BIT(0)
|
||||
#define STPENB_STEPENB 0x7FFF
|
||||
#define IRQENB_FIFO1THRES BIT(5)
|
||||
#define IRQENB_PENUP BIT(9)
|
||||
#define STEPCONFIG_MODE_HWSYNC 0x2
|
||||
#define STEPCONFIG_SAMPLES_AVG (1 << 4)
|
||||
#define STEPCONFIG_XPP (1 << 5)
|
||||
#define STEPCONFIG_XNN (1 << 6)
|
||||
#define STEPCONFIG_YPP (1 << 7)
|
||||
#define STEPCONFIG_YNN (1 << 8)
|
||||
#define STEPCONFIG_XNP (1 << 9)
|
||||
#define STEPCONFIG_YPN (1 << 10)
|
||||
#define STEPCONFIG_INM (1 << 18)
|
||||
#define STEPCONFIG_INP (1 << 20)
|
||||
#define STEPCONFIG_INP_5 (1 << 21)
|
||||
#define STEPCONFIG_FIFO1 (1 << 26)
|
||||
#define STEPCONFIG_OPENDLY 0xff
|
||||
#define STEPCONFIG_Z1 (3 << 19)
|
||||
#define STEPIDLE_INP (1 << 22)
|
||||
#define STEPCHARGE_RFP (1 << 12)
|
||||
#define STEPCHARGE_INM (1 << 15)
|
||||
#define STEPCHARGE_INP (1 << 19)
|
||||
#define STEPCHARGE_RFM (1 << 23)
|
||||
#define STEPCHARGE_DELAY 0x1
|
||||
#define CNTRLREG_TSCSSENB (1 << 0)
|
||||
#define CNTRLREG_STEPID (1 << 1)
|
||||
#define CNTRLREG_STEPCONFIGWRT (1 << 2)
|
||||
#define CNTRLREG_4WIRE (1 << 5)
|
||||
#define CNTRLREG_5WIRE (1 << 6)
|
||||
#define CNTRLREG_8WIRE (3 << 5)
|
||||
#define CNTRLREG_TSCENB (1 << 7)
|
||||
#define ADCFSM_STEPID 0x10
|
||||
|
||||
#define SEQ_SETTLE 275
|
||||
#define ADC_CLK 3000000
|
||||
#define MAX_12BIT ((1 << 12) - 1)
|
||||
#define TSCADC_DELTA_X 15
|
||||
#define TSCADC_DELTA_Y 15
|
||||
|
||||
struct tscadc {
|
||||
struct input_dev *input;
|
||||
struct clk *tsc_ick;
|
||||
void __iomem *tsc_base;
|
||||
unsigned int irq;
|
||||
unsigned int wires;
|
||||
unsigned int x_plate_resistance;
|
||||
bool pen_down;
|
||||
};
|
||||
|
||||
static unsigned int tscadc_readl(struct tscadc *ts, unsigned int reg)
|
||||
{
|
||||
return readl(ts->tsc_base + reg);
|
||||
}
|
||||
|
||||
static void tscadc_writel(struct tscadc *tsc, unsigned int reg,
|
||||
unsigned int val)
|
||||
{
|
||||
writel(val, tsc->tsc_base + reg);
|
||||
}
|
||||
|
||||
static void tscadc_step_config(struct tscadc *ts_dev)
|
||||
{
|
||||
unsigned int config;
|
||||
int i;
|
||||
|
||||
/* Configure the Step registers */
|
||||
|
||||
config = STEPCONFIG_MODE_HWSYNC |
|
||||
STEPCONFIG_SAMPLES_AVG | STEPCONFIG_XPP;
|
||||
switch (ts_dev->wires) {
|
||||
case 4:
|
||||
config |= STEPCONFIG_INP | STEPCONFIG_XNN;
|
||||
break;
|
||||
case 5:
|
||||
config |= STEPCONFIG_YNN |
|
||||
STEPCONFIG_INP_5 | STEPCONFIG_XNN |
|
||||
STEPCONFIG_YPP;
|
||||
break;
|
||||
case 8:
|
||||
config |= STEPCONFIG_INP | STEPCONFIG_XNN;
|
||||
break;
|
||||
}
|
||||
|
||||
for (i = 1; i < 7; i++) {
|
||||
tscadc_writel(ts_dev, REG_STEPCONFIG(i), config);
|
||||
tscadc_writel(ts_dev, REG_STEPDELAY(i), STEPCONFIG_OPENDLY);
|
||||
}
|
||||
|
||||
config = 0;
|
||||
config = STEPCONFIG_MODE_HWSYNC |
|
||||
STEPCONFIG_SAMPLES_AVG | STEPCONFIG_YNN |
|
||||
STEPCONFIG_INM | STEPCONFIG_FIFO1;
|
||||
switch (ts_dev->wires) {
|
||||
case 4:
|
||||
config |= STEPCONFIG_YPP;
|
||||
break;
|
||||
case 5:
|
||||
config |= STEPCONFIG_XPP | STEPCONFIG_INP_5 |
|
||||
STEPCONFIG_XNP | STEPCONFIG_YPN;
|
||||
break;
|
||||
case 8:
|
||||
config |= STEPCONFIG_YPP;
|
||||
break;
|
||||
}
|
||||
|
||||
for (i = 7; i < 13; i++) {
|
||||
tscadc_writel(ts_dev, REG_STEPCONFIG(i), config);
|
||||
tscadc_writel(ts_dev, REG_STEPDELAY(i), STEPCONFIG_OPENDLY);
|
||||
}
|
||||
|
||||
config = 0;
|
||||
/* Charge step configuration */
|
||||
config = STEPCONFIG_XPP | STEPCONFIG_YNN |
|
||||
STEPCHARGE_RFP | STEPCHARGE_RFM |
|
||||
STEPCHARGE_INM | STEPCHARGE_INP;
|
||||
|
||||
tscadc_writel(ts_dev, REG_CHARGECONFIG, config);
|
||||
tscadc_writel(ts_dev, REG_CHARGEDELAY, STEPCHARGE_DELAY);
|
||||
|
||||
config = 0;
|
||||
/* Configure to calculate pressure */
|
||||
config = STEPCONFIG_MODE_HWSYNC |
|
||||
STEPCONFIG_SAMPLES_AVG | STEPCONFIG_YPP |
|
||||
STEPCONFIG_XNN | STEPCONFIG_INM;
|
||||
tscadc_writel(ts_dev, REG_STEPCONFIG13, config);
|
||||
tscadc_writel(ts_dev, REG_STEPDELAY13, STEPCONFIG_OPENDLY);
|
||||
|
||||
config |= STEPCONFIG_Z1 | STEPCONFIG_FIFO1;
|
||||
tscadc_writel(ts_dev, REG_STEPCONFIG14, config);
|
||||
tscadc_writel(ts_dev, REG_STEPDELAY14, STEPCONFIG_OPENDLY);
|
||||
|
||||
tscadc_writel(ts_dev, REG_SE, STPENB_STEPENB);
|
||||
}
|
||||
|
||||
static void tscadc_idle_config(struct tscadc *ts_config)
|
||||
{
|
||||
unsigned int idleconfig;
|
||||
|
||||
idleconfig = STEPCONFIG_YNN |
|
||||
STEPCONFIG_INM |
|
||||
STEPCONFIG_YPN | STEPIDLE_INP;
|
||||
tscadc_writel(ts_config, REG_IDLECONFIG, idleconfig);
|
||||
}
|
||||
|
||||
static void tscadc_read_coordinates(struct tscadc *ts_dev,
|
||||
unsigned int *x, unsigned int *y)
|
||||
{
|
||||
unsigned int fifocount = tscadc_readl(ts_dev, REG_FIFO0CNT);
|
||||
unsigned int prev_val_x = ~0, prev_val_y = ~0;
|
||||
unsigned int prev_diff_x = ~0, prev_diff_y = ~0;
|
||||
unsigned int read, diff;
|
||||
unsigned int i;
|
||||
|
||||
/*
|
||||
* Delta filter is used to remove large variations in sampled
|
||||
* values from ADC. The filter tries to predict where the next
|
||||
* coordinate could be. This is done by taking a previous
|
||||
* coordinate and subtracting it form current one. Further the
|
||||
* algorithm compares the difference with that of a present value,
|
||||
* if true the value is reported to the sub system.
|
||||
*/
|
||||
for (i = 0; i < fifocount - 1; i++) {
|
||||
read = tscadc_readl(ts_dev, REG_FIFO0) & 0xfff;
|
||||
diff = abs(read - prev_val_x);
|
||||
if (diff < prev_diff_x) {
|
||||
prev_diff_x = diff;
|
||||
*x = read;
|
||||
}
|
||||
prev_val_x = read;
|
||||
|
||||
read = tscadc_readl(ts_dev, REG_FIFO1) & 0xfff;
|
||||
diff = abs(read - prev_val_y);
|
||||
if (diff < prev_diff_y) {
|
||||
prev_diff_y = diff;
|
||||
*y = read;
|
||||
}
|
||||
prev_val_y = read;
|
||||
}
|
||||
}
|
||||
|
||||
static irqreturn_t tscadc_irq(int irq, void *dev)
|
||||
{
|
||||
struct tscadc *ts_dev = dev;
|
||||
struct input_dev *input_dev = ts_dev->input;
|
||||
unsigned int status, irqclr = 0;
|
||||
unsigned int x = 0, y = 0;
|
||||
unsigned int z1, z2, z;
|
||||
unsigned int fsm;
|
||||
|
||||
status = tscadc_readl(ts_dev, REG_IRQSTATUS);
|
||||
if (status & IRQENB_FIFO1THRES) {
|
||||
tscadc_read_coordinates(ts_dev, &x, &y);
|
||||
|
||||
z1 = tscadc_readl(ts_dev, REG_FIFO0) & 0xfff;
|
||||
z2 = tscadc_readl(ts_dev, REG_FIFO1) & 0xfff;
|
||||
|
||||
if (ts_dev->pen_down && z1 != 0 && z2 != 0) {
|
||||
/*
|
||||
* Calculate pressure using formula
|
||||
* Resistance(touch) = x plate resistance *
|
||||
* x postion/4096 * ((z2 / z1) - 1)
|
||||
*/
|
||||
z = z2 - z1;
|
||||
z *= x;
|
||||
z *= ts_dev->x_plate_resistance;
|
||||
z /= z1;
|
||||
z = (z + 2047) >> 12;
|
||||
|
||||
if (z <= MAX_12BIT) {
|
||||
input_report_abs(input_dev, ABS_X, x);
|
||||
input_report_abs(input_dev, ABS_Y, y);
|
||||
input_report_abs(input_dev, ABS_PRESSURE, z);
|
||||
input_report_key(input_dev, BTN_TOUCH, 1);
|
||||
input_sync(input_dev);
|
||||
}
|
||||
}
|
||||
irqclr |= IRQENB_FIFO1THRES;
|
||||
}
|
||||
|
||||
/*
|
||||
* Time for sequencer to settle, to read
|
||||
* correct state of the sequencer.
|
||||
*/
|
||||
udelay(SEQ_SETTLE);
|
||||
|
||||
status = tscadc_readl(ts_dev, REG_RAWIRQSTATUS);
|
||||
if (status & IRQENB_PENUP) {
|
||||
/* Pen up event */
|
||||
fsm = tscadc_readl(ts_dev, REG_ADCFSM);
|
||||
if (fsm == ADCFSM_STEPID) {
|
||||
ts_dev->pen_down = false;
|
||||
input_report_key(input_dev, BTN_TOUCH, 0);
|
||||
input_report_abs(input_dev, ABS_PRESSURE, 0);
|
||||
input_sync(input_dev);
|
||||
} else {
|
||||
ts_dev->pen_down = true;
|
||||
}
|
||||
irqclr |= IRQENB_PENUP;
|
||||
}
|
||||
|
||||
tscadc_writel(ts_dev, REG_IRQSTATUS, irqclr);
|
||||
/* check pending interrupts */
|
||||
tscadc_writel(ts_dev, REG_IRQEOI, 0x0);
|
||||
|
||||
tscadc_writel(ts_dev, REG_SE, STPENB_STEPENB);
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
/*
|
||||
* The functions for inserting/removing driver as a module.
|
||||
*/
|
||||
|
||||
static int __devinit tscadc_probe(struct platform_device *pdev)
|
||||
{
|
||||
const struct tsc_data *pdata = pdev->dev.platform_data;
|
||||
struct resource *res;
|
||||
struct tscadc *ts_dev;
|
||||
struct input_dev *input_dev;
|
||||
struct clk *clk;
|
||||
int err;
|
||||
int clk_value, ctrl, irq;
|
||||
|
||||
if (!pdata) {
|
||||
dev_err(&pdev->dev, "missing platform data.\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
if (!res) {
|
||||
dev_err(&pdev->dev, "no memory resource defined.\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
irq = platform_get_irq(pdev, 0);
|
||||
if (irq < 0) {
|
||||
dev_err(&pdev->dev, "no irq ID is specified.\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
/* Allocate memory for device */
|
||||
ts_dev = kzalloc(sizeof(struct tscadc), GFP_KERNEL);
|
||||
input_dev = input_allocate_device();
|
||||
if (!ts_dev || !input_dev) {
|
||||
dev_err(&pdev->dev, "failed to allocate memory.\n");
|
||||
err = -ENOMEM;
|
||||
goto err_free_mem;
|
||||
}
|
||||
|
||||
ts_dev->input = input_dev;
|
||||
ts_dev->irq = irq;
|
||||
ts_dev->wires = pdata->wires;
|
||||
ts_dev->x_plate_resistance = pdata->x_plate_resistance;
|
||||
|
||||
res = request_mem_region(res->start, resource_size(res), pdev->name);
|
||||
if (!res) {
|
||||
dev_err(&pdev->dev, "failed to reserve registers.\n");
|
||||
err = -EBUSY;
|
||||
goto err_free_mem;
|
||||
}
|
||||
|
||||
ts_dev->tsc_base = ioremap(res->start, resource_size(res));
|
||||
if (!ts_dev->tsc_base) {
|
||||
dev_err(&pdev->dev, "failed to map registers.\n");
|
||||
err = -ENOMEM;
|
||||
goto err_release_mem_region;
|
||||
}
|
||||
|
||||
err = request_irq(ts_dev->irq, tscadc_irq,
|
||||
0, pdev->dev.driver->name, ts_dev);
|
||||
if (err) {
|
||||
dev_err(&pdev->dev, "failed to allocate irq.\n");
|
||||
goto err_unmap_regs;
|
||||
}
|
||||
|
||||
ts_dev->tsc_ick = clk_get(&pdev->dev, "adc_tsc_ick");
|
||||
if (IS_ERR(ts_dev->tsc_ick)) {
|
||||
dev_err(&pdev->dev, "failed to get TSC ick\n");
|
||||
goto err_free_irq;
|
||||
}
|
||||
clk_enable(ts_dev->tsc_ick);
|
||||
|
||||
clk = clk_get(&pdev->dev, "adc_tsc_fck");
|
||||
if (IS_ERR(clk)) {
|
||||
dev_err(&pdev->dev, "failed to get TSC fck\n");
|
||||
err = PTR_ERR(clk);
|
||||
goto err_disable_clk;
|
||||
}
|
||||
|
||||
clk_value = clk_get_rate(clk) / ADC_CLK;
|
||||
clk_put(clk);
|
||||
|
||||
if (clk_value < 7) {
|
||||
dev_err(&pdev->dev, "clock input less than min clock requirement\n");
|
||||
goto err_disable_clk;
|
||||
}
|
||||
/* CLKDIV needs to be configured to the value minus 1 */
|
||||
tscadc_writel(ts_dev, REG_CLKDIV, clk_value - 1);
|
||||
|
||||
/* Enable wake-up of the SoC using touchscreen */
|
||||
tscadc_writel(ts_dev, REG_IRQWAKEUP, IRQWKUP_ENB);
|
||||
|
||||
ctrl = CNTRLREG_STEPCONFIGWRT |
|
||||
CNTRLREG_TSCENB |
|
||||
CNTRLREG_STEPID;
|
||||
switch (ts_dev->wires) {
|
||||
case 4:
|
||||
ctrl |= CNTRLREG_4WIRE;
|
||||
break;
|
||||
case 5:
|
||||
ctrl |= CNTRLREG_5WIRE;
|
||||
break;
|
||||
case 8:
|
||||
ctrl |= CNTRLREG_8WIRE;
|
||||
break;
|
||||
}
|
||||
tscadc_writel(ts_dev, REG_CTRL, ctrl);
|
||||
|
||||
tscadc_idle_config(ts_dev);
|
||||
tscadc_writel(ts_dev, REG_IRQENABLE, IRQENB_FIFO1THRES);
|
||||
tscadc_step_config(ts_dev);
|
||||
tscadc_writel(ts_dev, REG_FIFO1THR, 6);
|
||||
|
||||
ctrl |= CNTRLREG_TSCSSENB;
|
||||
tscadc_writel(ts_dev, REG_CTRL, ctrl);
|
||||
|
||||
input_dev->name = "ti-tsc-adc";
|
||||
input_dev->dev.parent = &pdev->dev;
|
||||
|
||||
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
|
||||
input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
|
||||
|
||||
input_set_abs_params(input_dev, ABS_X, 0, MAX_12BIT, 0, 0);
|
||||
input_set_abs_params(input_dev, ABS_Y, 0, MAX_12BIT, 0, 0);
|
||||
input_set_abs_params(input_dev, ABS_PRESSURE, 0, MAX_12BIT, 0, 0);
|
||||
|
||||
/* register to the input system */
|
||||
err = input_register_device(input_dev);
|
||||
if (err)
|
||||
goto err_disable_clk;
|
||||
|
||||
platform_set_drvdata(pdev, ts_dev);
|
||||
return 0;
|
||||
|
||||
err_disable_clk:
|
||||
clk_disable(ts_dev->tsc_ick);
|
||||
clk_put(ts_dev->tsc_ick);
|
||||
err_free_irq:
|
||||
free_irq(ts_dev->irq, ts_dev);
|
||||
err_unmap_regs:
|
||||
iounmap(ts_dev->tsc_base);
|
||||
err_release_mem_region:
|
||||
release_mem_region(res->start, resource_size(res));
|
||||
err_free_mem:
|
||||
input_free_device(input_dev);
|
||||
kfree(ts_dev);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int __devexit tscadc_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct tscadc *ts_dev = platform_get_drvdata(pdev);
|
||||
struct resource *res;
|
||||
|
||||
free_irq(ts_dev->irq, ts_dev);
|
||||
|
||||
input_unregister_device(ts_dev->input);
|
||||
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
iounmap(ts_dev->tsc_base);
|
||||
release_mem_region(res->start, resource_size(res));
|
||||
|
||||
clk_disable(ts_dev->tsc_ick);
|
||||
clk_put(ts_dev->tsc_ick);
|
||||
|
||||
kfree(ts_dev);
|
||||
|
||||
platform_set_drvdata(pdev, NULL);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct platform_driver ti_tsc_driver = {
|
||||
.probe = tscadc_probe,
|
||||
.remove = __devexit_p(tscadc_remove),
|
||||
.driver = {
|
||||
.name = "tsc",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
};
|
||||
module_platform_driver(ti_tsc_driver);
|
||||
|
||||
MODULE_DESCRIPTION("TI touchscreen controller driver");
|
||||
MODULE_AUTHOR("Rachna Patil <rachna@ti.com>");
|
||||
MODULE_LICENSE("GPL");
|
17
include/linux/input/ti_tscadc.h
Normal file
17
include/linux/input/ti_tscadc.h
Normal file
|
@ -0,0 +1,17 @@
|
|||
#ifndef __LINUX_TI_TSCADC_H
|
||||
#define __LINUX_TI_TSCADC_H
|
||||
|
||||
/**
|
||||
* struct tsc_data Touchscreen wire configuration
|
||||
* @wires: Wires refer to application modes
|
||||
* i.e. 4/5/8 wire touchscreen support
|
||||
* on the platform.
|
||||
* @x_plate_resistance: X plate resistance.
|
||||
*/
|
||||
|
||||
struct tsc_data {
|
||||
int wires;
|
||||
int x_plate_resistance;
|
||||
};
|
||||
|
||||
#endif
|
Loading…
Reference in a new issue